Number of nX4 0..1 arrays with every element equal to 0, 1, 3 or 6 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.
A302631
Number of nX4 0..1 arrays with every element equal to 0, 1, 3 or 6 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.
Terms
- a(0) =5a(1) =17a(2) =14a(3) =33a(4) =101a(5) =248a(6) =657a(7) =1841a(8) =4892a(9) =13020a(10) =35447a(11) =95226a(12) =255042a(13) =688238a(14) =1852413a(15) =4976015a(16) =13395869a(17) =36053423a(18) =96953152a(19) =260865015a(20) =701948030a(21) =1888295155a(22) =5080237927a(23) =13668712238a(24) =36773414080a(25) =98934258153a(26) =266178278368
External references
- oeis: A302631